#
#
#
#
#
# def add(x,y):
#     res = x+y
#     r = add1()
#     # r = add2()
#     res = res+r
#     return res
#
#
#
# # 商品排序 ---- 复杂度为O(n)
#
# def sort():
#     result =
#
#     res =
#     pass
#
#
# def add(x,y):
#     res = x+y
#
# def add2():
#     return 1
#
# def add1():
#     print('做了很多复杂的错误')
#
#     return 1
#
# add('a',1)



def calc(x,y):
    c = x / y
    return c

# calc(5,0)

# c = 5/0


# https://www.xxx.com/api/v1/books/



def adder(x):
    def wrapper(y):
        return x+y
    return wrapper

adder5 = adder(5)
print(adder5(adder5(6)))